Double-Ring Resonator Electro-Optic Devices for Microwave Photonics
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Solution Overview
Problem
Current electro-optic devices for classical and quantum microwave photonics lack efficient and scalable solutions for coherent microwave-to-optical conversion with high bandwidth and low noise, limiting their applications in quantum communications and computing.
Innovation Solution
The development of integrated electro-optic devices using lithium niobate or lithium tantalate with double-ring resonators and microwave electrodes, enabling efficient coherent microwave-to-optical conversion through evanescent coupling and microwave-assisted photonic transitions, achieving high modulation efficiency and large bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional electro-optic devices are used for microwave-to-optical conversion, then device simplicity is maintained, but conversion efficiency and bandwidth are insufficient
Solution Approach 1:
The device is segmented into functionally distinct components: input waveguide, first ring resonator for frequency conversion, second ring resonator for signal enhancement, and output waveguide. This segmentation allows each component to be optimized for its specific function, achieving high conversion efficiency while maintaining modular scalability.
Solution Approach 2:
The patent implements nested ring resonators where the first and second ring resonators are evanescently coupled and positioned in close proximity. This nested configuration enables compact integration of multiple functional elements within a small footprint, increasing conversion efficiency without proportionally increasing device complexity.
2Speed
If high bandwidth is achieved through device design, then conversion efficiency improves, but optical loss increases
Solution Approach 1:
The device employs dynamically可调 ring resonators with electro-optic modulation capability, allowing the resonant frequencies and coupling strengths to be adjusted in real-time. This dynamic control enables optimization of bandwidth and optical loss trade-offs depending on operational requirements, achieving high bandwidth without excessive loss.
Solution Approach 2:
The patent utilizes parameter changes in the ring resonator design, including varying ring radii, adjusting gap distances between resonators, and modifying electrode configurations. These parameter optimizations enable the device to achieve high electro-optical bandwidth while minimizing optical insertion loss through precise control of resonant conditions.
3Adaptability or versatility
If integrated electro-optic devices are implemented, then scalability is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent implements local quality variations in the ring resonator structure, with different ring radii (first ring resonator with radius R1, second ring resonator with radius R2) and differentiated electrode positions. This local differentiation enables independent optimization of each resonator's performance characteristics while maintaining overall scalability across different device configurations.
Solution Approach 2:
The integrated device structure serves multiple functions: frequency conversion, signal amplification, and quantum state preservation. The universal ring resonator design can be scaled and adapted for different applications in quantum communications and classical microwave photonics, reducing the need for application-specific customizations and simplifying manufacturing processes.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
These devices demonstrate high-efficiency classical coherent single-sideband microwave-to-optical conversion with low optical loss, large electro-optical response, and scalable integration, suitable for quantum communications and classical microwave photonics applications.
Implementation Method 1
a second ring resonator, the second ring resonator evanescently coupled to the first ring resonator and to the waveguide
Implementation Method 2
integrated electro-optic devices using lithium niobate or lithium tantalate with double-ring resonators and microwave electrodes, enabling efficient coherent microwave-to-optical conversion through evanescent coupling and microwave-assisted photonic transitions
Data Source
AI summary
Electro-optic devices for classical and quantum microwave photonics are provided. In various embodiments, a device comprises: a waveguide; a first ring resonator; a second ring resonator, the second ring resonator evanescently coupled to the first ring resonator and to the waveguide; a first pair of electrodes, one of the first pair of electrodes disposed within the first ring resonator and the other of the first pair of electrodes disposed without the first ring resonator; a second pair of electrodes, one of the second pair of electrodes disposed within the second ring resonator and the other of the second pair of electrodes disposed without the second ring resonator; a microwave source electrically coupled to the first and second pairs of electrodes; a bias port electrically coupled to the first and second pairs of electrodes and configured to sweep a frequency band.